| (19) |
 |
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(11) |
EP 0 639 654 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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11.10.1995 Bulletin 1995/41 |
| (43) |
Date of publication A2: |
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22.02.1995 Bulletin 1995/08 |
| (22) |
Date of filing: 18.08.1994 |
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| (84) |
Designated Contracting States: |
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DE FR GB IT |
| (30) |
Priority: |
19.08.1993 JP 204940/93
25.03.1994 JP 56219/94
|
| (71) |
Applicants: |
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- HITACHI METALS, LTD.
Chiyoda-ku,
Tokyo (JP)
- HONDA GIKEN KOGYO KABUSHIKI KAISHA
Minato-ku
Tokyo (JP)
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| (72) |
Inventors: |
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- Sato, Koji
Yasugi-shi (JP)
- Ohno, Takehiro
Yasugi-shi (JP)
- Sato, Katsuaki
Haga-gun,
Tochigi-ken (JP)
- Saka, Tsutomu
Kawagoe-shi (JP)
|
| (74) |
Representative: Patentanwälte
Beetz - Timpe - Siegfried
Schmitt-Fumian - Mayr |
|
Steinsdorfstrasse 10
80538 München
80538 München (DE) |
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| |
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| (54) |
Fe-Ni-Cr-base super alloy, engine valve and knitted mesh supporter for exhaust gas
catalyzer |
(57) An Fe-Ni-Cr-base superalloy essentially consists of, by weight, up to 0.15 % C, up
to 1.0 % Si, up to 3.0 % Mn, 30 to 49 % Ni, 10 to 18 % Cr, 1.6 to 3.0 % Al, one or
more elements selected from Groups IVa and Va whose amount or total amount is 1.5
to 8.0 %, and balance of Fe and unavoidable impurities. If necessary, Mo, W, Co, B,
Mg, Ca, Y and REM can be added in predetermined ranges. The superalloy is suitable
for engine valves, knitted mesh supporters for exhaust gas catalyzers and so forth,
and is excellent in high-temperature strength and normal-temperature ductility after
long-time heating and has a sufficient acid resistance property.